Frame or machine for cutting the pile of pile fabrics



G. ROGER April 21, 1931.

FRAME OR MACHINE FOR CUTTING THE FILE OF FILE FABRICS Filed June 16, 1930 6' .5 121/ 12274f IOZ! 466/2 ir/yey J? I fw 1% w m Z 2 KW W.

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Patented Apr. 21, 1931 UNITED STATES enonen ROGER, or wnnnme'ron, ENGLAND FRAME OR MACHINE FOR CUTTING THE FILE OF PILEFABRIGS Application filed June 16, 1930, Serial No. 461,514, and in'Great Britain August 3, 1929.

The invention relates to what may be termedIthe cord and pulley type'of cutting frame or machine, or one in which carrla es supporting the cutting knives and rests, on

the same, and here termed the primary .car-

riages,are moved by means of attached and pulley guided cords at the extremes of said I frame, under the control of theoperator.

The object of the present invention is to provide means whereby the knives and rests are automatically caused to. move relatively to said primary carriages or supports when more than the normal resistance to a knife, or

less, as the case may be, occurs, such as when the guide or knife pierces the cloth, on the one hand, orruns out of the race of pile being cut, onthe other hand. The result of this ,to the cloth being operatedupon is avoided,

tion takes places enables the machine to be operated by mechanical power as clistinguished .from ordinary hand power. Also a greater number of knives than usual can be employed at once, or several be controlled by one operative. I

According to ,my invention, I employ for each primary carriage referred to, what I term a secondarycarriage supported by and 7 capable. of relative: movement to said pri-",

mary carriage. The knife and its rest or holder portion rides upon this secondary I carriage,as the pair of carriages are moved from end to end of the length of piece of .cloth being operated upon; I employ a pulley and cord system in relation to the carriages and extreme pulleys employed therefor on the frame, so that should a variation from race of pile being cut or partially out as the tion of the pilebeing cut varies.

ent scales. relatlve movement is that excesslve damage the' normalresistance at the knife and guide. I occur,,the' secondary carriage moves in the one direction orthe other, relatively to the, primary carriage, and in thedirection of the case may be. Springand lever devices are.

With reference to the accompanying drawings, Fig. 1 is aplan view of a primary carriage supporting a secondary carriage according .to a form of my invention. Fig. 2 is aside sectional view of said Fig.1;

Fig. 3 is a portion of Fig. 2 but on a difl'erent and enlarged scale, thicknesses of parts being exaggerated for clearness sake.

Fig. 4 shows on a reduced scalea device according to Fig. 2 in relation to'the frame 0 employed, the latter containing mechanism for reversing the motion of the machine or parts, and for traverse laterally of the carriages involved. I I i 1 Fig. 5 is a plan View of parts of Fig. 4.

Figs. 6, 7 and 8 are modifications on difier- In Figs. 1-to the primary 'carriage,,here

. assumed to be a flatpiece of wood of suitable area, is shown at 1, and it 'is-resting upon a stretched length of cloth at 2, the loops of pile of which are being cut by the knife. The metalportion of this knife is indicated at 3, the point of'which is provided with the usual guide, and the wooden portion of the holder for the knife is shown at 4, the rest therefor being at 5. e

The usual'cords for actuating the primary carriage areshown at 6, which pass about end pulleys 7 driven in any suitable manner for revolving the-pulleys and so moving the primary carriage from one end of the stretched I length of cloth 2 to the other, when a reversal of motion brings the knifeback to the initial or setting in position. I

Traverse of the mechanism and the primary carriage laterally brings the knife point and the guide therefor in position for cutting the pile of thenext race tobe operated upon,

as isunderstood.

.; According tomy invention I provide a secondary or knife-supporting carriage, such as 8 which may also be composed of'a flat piece of woodor otherwise. This carriage is shown formed witha slot at 9 '(Fig. 3) into which the lower part of the rest 5 for the knife may take when ready for cutting purposes. A back piece or upright 10 operates to push the knife when thesecondary carriage 8 is moved forward bybeing carried with the primary carriage 1 for that purpose. The last named carriage is shown provided with corner and revoluble pulleys 11. Special cords 12 are shown passing about these pulleys, bifurcated extremes of which are connected at 13 to the front part of the carriage 8, and pass around end pulleys 14; one suitably mounted at the front end for being controlled so that the tension upon the cords 12 may be regulated to suit the conditions existing. The other extreme of cord 12 is attached to the front of carriage 1. A screw device of ordinary nature is indicated at 15 (Fig. 1) whereby the length of the cords may be adjusted.

A spring buffer is shown at 16 on the primary carriage 1, in case the secondary carriage 8 moves against the same. It will be seen that for a given tension on the cords 12, the knife 3 offers a given resistance to the load upon the same due to cutting through the pile of cloth operated upon. Any variation of moment of that load will result in the tension named causing the carriage 8 to move in the one direction or the other, according to the nature of the cause for that variation. If the knife runs out of the race being out, then it will tend to move forward, but if the knife pierces the cloth, or encounters some abnormal defect in the same due toweaving,

then it will be forced back, either of which movements being relative to the primary carriage 1.

In this way, the knife is caused to react in a manner similar to what occurs on the part of an operator during ordinary hand cutting of weft pile fabrics.

In the example given, the tension upon the cords 12 is attained by the revoluble pulley 1 1 at the front end of the frame, being mounted on an arm or lever 17, pivoted at 18 to a transversely movable frame 19. A link 20 to a lever 21, pivoted at 22 on said frame 19 has a projecting leg 23 carrying a movable weight, along the same 24. A small revoluble pulley 25 on frame 19 is connected by a cord shown to a spring 26 attached to frame 19 and to said lever 21. It will be seen that movement backward of the carriage 8 will result in resistance due to spring 26, and weight 24 being brought into operation.

It is evident that in the example given the carriage 8 rests above the carriage 1, and is guided thereon by clips upon 8 shown at 27 engaging stiff wires attached to the bosses for the support of pulleys '11 or said carriage 8 is wholly supported by said wires and rides upon the same but not necessarily so. In Fig. 6 pulleys are revolubly mounted on the secondary carriage 8, with extremes attached to the primary one at 29 the cord 12 being under a yielding restraint as in the former cases, and after passing around the end pulleys such as 14 in Fig. 4,, is attached at back part of the primary carriage 1 since in this case, the knife end would point to the right, or be reversed.

In Fig. 7 the secondary carriage for the knife is a known form of device and is designed to support the knife on an arm or support 30 pivoted at 31 to an upright 32 on the base 8. The arrangement of cords is similar to that of Fig. 1. The extreme end is attached to arm 30. The rest 5 is merely in abutment contact with arm 30.

In Fig. 8 one pulley 11 only is employed, and it is assumed to be below the level of the knife when the latter is placed in position.

I claim:

1. In a frame or machine employed for the cutting of the pile or pile fabrics, and of the type in which what is here termed a primary carriage for carrying the cutting knife is moved in the direction of the race of pile being cut by a continuous flexible connection or cord passing round revoluble end pulleys and attached to the ends of said primary carriage, a knife carrier and knife thereon movably mounted relatively to and above the primary carriage beforenamed, said move-. ment being parallel to the direction of the race of pile being cut, a flexible connection at one extremity attached to said knife carrier and, at the other extremity to the front part of the primary carriage aforesaid, said.

flexible connection passing round revolubly mounted pulleys at the end parts of the frame, a movable mount for one of said pulleys in connection with motion resisting means of a resilient nature, for providing the resistance at the knife for normal conditions thereat, whereby on said knife acting improperly said resistance operates or, alternatively, is overcome, and the knife carrier with the knife moves relatively to the primary carriage beforenamed, as herein set forth.

2. In a frame or machine employed for the cutting of the pile of pile fabrics, and of the type in which what is here termed a primary carriage for carrying the cutting knife is moved in the direction of the race of pile being cut by a continuous flexible connection or cord passing round revoluble end pulleys and attached to the ends of said primary carriage, a secondary knife carriage and knife thereon movably mounted relatively to and above the primary carriage abovenamed, said movement being parallel. to the direction of the race of pile being cut, a flexible connection at one extremity attached to said secondary knife carriage and, at the other extremity to the front part of'the primary carriage aforesaid, said flexible connection passing round revolubly mounted pulleys at the end parts of the frame, a lever forming a mount for one of said pulleys mounted upon a pivot on a transversely movable frame situated outside the extreme part of the stretched cloth operated upon, a spring between an end of said lever and a point of at- 

